3,4,5. please include formulas. much love will thumbs up

QUESTION 3 A S1000 bond with a coupon rate of 4%, interest paid semiannually, matures in 14 years, and sells for $980. What is the yield to maturity? (round it to four decimal places) QUESTION 4 Calculate the total return on a $1,000 face value, 5 percent coupon bond (annual) purchased for $1.030, and sold 3 years later for $950 if the coupons are reinvested at 6%. (round it to 4 decimal places) QUESTIONS You have purchased a bond for $973.02. The bond has a coupon rate of 64% (with annual payments), a face value of $1,000, 4 years to maturity, and a yield to maturity of 7.2%. The bond's duration is 3.6481 years. You expect that interest rates will rise by 2% later today. Use the duration (concept) to find the approximate percentage change in the bond's price (round to four decimal places)